Large variable diameter shaft part induction heat-treatment and quenching technical method

Abstract

The invention relates to a large variable diameter shaft part induction heat-treatment and quenching technical method. A power output driven shaft is taken as an example, a continuous heating quenching way and a liquid injecting cooling quenching way are adopted, and the action procedure of a machine tool comprises the steps of: preheating from the upper end of a spline and continuously walking at variable speed to the position of a shaft neck of phi 45; preheating, stagnating, and heating for a plurality of seconds 'determining according to the actual situation; heating, stopping heating, moving to the position of phi 68 for heating, lagging, heating and injecting liquid; moving to the position of 45 for continuously heating to 3-5mm of the upper end of the spline 'wherein the moving speed is different at the two sections of phi 45 and phi 37.1 andcan be shown in numerical control programming'; moving to a certain position of the upper end of phi 37.1 'in numerical control X is equal to -53'; injecting liquid for a plurality of seconds 'determining by experiment'; and returning to zero. The method has the advantages of saving energy and reducing consumption, being convenient for operation, lightening the labor intensity, improving the working environment and the like.

Description

【Technical field】 [0001] The invention relates to an induction heat treatment and quenching process method for shaft parts with variable diameters, in particular to an induction heat treatment and quenching process method for shaft parts with large variable diameters. 【Background technique】 [0002] At present, due to the rapid replacement of tractor products, take our company as an example: the new product SZ904 tractor introduced and developed, the E304 front axle of Kaifeng Company, etc., have high technical content and are relatively difficult to manufacture. Some of the special parts , such as the power output driven shaft, front drive shaft, half shaft and other parts all have 3 or more steps, and the cross-sectional size changes greatly "the size and diameter change is more than 10mm on one side". [0003] For multi-step shaft parts, induction heating usually adopts the longitudinal rotary heating overall quenching method "Singleshot". The principle of this method is...

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Problems solved by technology

Because this method has a series of disadvantages such as the inductor span is larger than that of the ring-type quenching inductor, the design is complicated, the processing and manufacturing is difficult, and energy is wasted, so it is necessary to improve the process

[0013] The longitudinal one-time heating and quenching method is difficult to meet the quenching requirements of special large-diameter and multi-step shaft parts. It is a difficult problem of induction heating. So far, there are no application examples and literature for reference.

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